XML 32 R15.htm IDEA: XBRL DOCUMENT v3.20.4

Inventories

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories are stated at the lower of cost (principally average cost, first-in, first-out basis) or net realizable value. Inventories as of December 31, 2020 and 2019 were as follows (in millions):

			2020						2019
Asphalt			$	4.2					$	8.0
Processed rock and sand			7.9						6.6
Work in progress			3.2						2.9
Retail merchandise			2.1						2.0
Parts, materials and supplies inventories			1.0						1.2
Total			$	18.4					$	20.7

X

- References

No definition available.

+ Details

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-URI http://asc.fasb.org/topic&trid=2126998

+ Details

Name:	us-gaap_InventoryDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration